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https://dev.mysql.com/doc/refman/9.7/en/gis-class-polygon.html
A Polygon is a planar Surface representing a multisided geometry. It is defined by a single exterior boundary and zero or more interior boundaries, where each interior boundary defines a hole in the Polygon. Polygon Examples On a region map, ...
https://dev.mysql.com/doc/refman/9.7/en/gis-format-conversion-functions.html
MySQL supports the functions listed in this section for converting geometry values from internal geometry format to WKT or WKB format, or for swapping the order of X and Y coordinates. There are also functions to convert a string from WKT or WKB ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-communication-protocol.html
Group Replication in MySQL 9.7 uses the concept of a group communication protocol whose version can be managed explicitly, and set to accommodate the oldest MySQL Server version that you want the group to support. This enables groups to be formed ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-configuring-ssl-for-recovery.html
Important When using the MySQL communication stack (group_replication_communication_stack=MYSQL) AND secure connections between members (group_replication_ssl_mode is not set to DISABLED), the security settings discussed in this section are applied ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-network-partitioning.html
The group needs to achieve consensus whenever a change that needs to be replicated happens. This is the case for regular transactions but is also required for group membership changes and some internal messaging that keeps the group consistent.
https://dev.mysql.com/doc/refman/9.7/en/group-replication-observability.html
There is a lot of automation built into the Group Replication plugin. Nonetheless, you might sometimes need to understand what is happening behind the scenes. This is where the instrumentation of Group Replication and Performance Schema becomes ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-online-upgrade-methods.html
Choose one of the following methods of upgrading a Group Replication group: Rolling In-Group Upgrade This method is supported provided that servers running a newer version are not generating workload to the group while there are still servers with ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-probes-and-statistics.html
The monitoring mechanism works by having each member deploying a set of probes to collect information about its work queues and throughput. It then propagates that information to the group periodically to share that data with the other members.
https://dev.mysql.com/doc/refman/9.7/en/group-replication-requirements.html
Infrastructure Server Instance Configuration Server instances that you want to use for Group Replication must satisfy the following requirements. Transactions are executed optimistically and then, at commit time, are checked for conflicts. If there ...
https://dev.mysql.com/doc/refman/9.7/en/group-replication-resource-manager-component.html
The Group Replication Resource Manager component monitors secondary server lag time and memory usage, and can expel servers which lag excessively or use too many resources from the group. Allowable lag time and resource usage are configurable for ...